Angular 5 中的指令 return html
Directive in Angular 5 for return html
我如何return小html一块指令。这就是我想要做的:
<app-icon glyph="music"><app-icon>
应替换为:
<span class='glyphicon glyphico-music' aria-hidden='true'></span>
我的错误指令:
import { Directive } from "@angular/core";
@Directive({
selector: "[app-icon]"
})
export class IconDirective {
constructor(value: string) {
return "<span class='glyphicon glyphicon-" +value + "' aria-hidden='true'></span>";
}
}
您可以使用 @angular/core
中的 ElementRef
:
constructor(private _el: ElementRef) {
this._el.nativeElement.insertAdjacentHTML('beforeend',
'<span class='glyphicon glyphicon-" +value + "' aria-hidden='true'></span>');
}
根据之前的回答我是这样解决的:
import { Directive, ElementRef, Input, OnInit } from "@angular/core";
@Directive({
selector: "app-icon"
})
export class IconDirective implements OnInit {
@Input() glyph;
constructor(private el: ElementRef) { }
ngOnInit() {
this.el.nativeElement.insertAdjacentHTML("beforeend",
`<span class='glyphicon glyphicon-${this.glyph} aria-hidden='true'></span>`);
}
}
ngOnInit
是必需的,因为 @Input glyph
未在构造函数
中初始化
我如何return小html一块指令。这就是我想要做的:
<app-icon glyph="music"><app-icon>
应替换为:
<span class='glyphicon glyphico-music' aria-hidden='true'></span>
我的错误指令:
import { Directive } from "@angular/core";
@Directive({
selector: "[app-icon]"
})
export class IconDirective {
constructor(value: string) {
return "<span class='glyphicon glyphicon-" +value + "' aria-hidden='true'></span>";
}
}
您可以使用 @angular/core
中的 ElementRef
:
constructor(private _el: ElementRef) {
this._el.nativeElement.insertAdjacentHTML('beforeend',
'<span class='glyphicon glyphicon-" +value + "' aria-hidden='true'></span>');
}
根据之前的回答我是这样解决的:
import { Directive, ElementRef, Input, OnInit } from "@angular/core";
@Directive({
selector: "app-icon"
})
export class IconDirective implements OnInit {
@Input() glyph;
constructor(private el: ElementRef) { }
ngOnInit() {
this.el.nativeElement.insertAdjacentHTML("beforeend",
`<span class='glyphicon glyphicon-${this.glyph} aria-hidden='true'></span>`);
}
}
ngOnInit
是必需的,因为 @Input glyph
未在构造函数